在时间域中的大倾角波动方程偏移

本文给出了在时间域中的大倾角波动方程偏移算法。计算了波散引起的偏移误差。用这个算法偏移合成和叠加地震资料,取得了好的效果。最后还给出了复杂断块地区野外地震资料偏移的例子。     

基于k-目标跟踪的节点部署优化算法

针对无线传感网络(WSNs)目标跟踪的节点部署问题,提出了基于 k- 目标跟踪的节点部署优化算法．该算法考虑不同的 k 值、目标半径、跟踪角度、节点通信半径和兴趣区域的形状对 k 个目标跟踪性能的影响．先将兴趣区域划分为等边三角形、矩形和六边形模型,再估计这些模型中的最优边长和节点的跟踪方向．再依据最优边长去估计部署节点位置．最后,依据这些模型,实现 k 个目标跟踪所需的最少节点数．实验数据表明,提出的算法能够有效地跟踪目标．      

赤布张错幅地质调查新成果及主要进展

于二叠纪-古近纪地层中发现动物化石、植物化石和孢粉多属多种。其中所有孢粉和植物化石在测区均为首次发现。发现软体动物并建立1新属2新种(Quemocuomegalodon orientus Yao Sha et Zhang，Q．longitatus Yao Sha et Zhang)。在藏北地区首次发现典型的古近纪双壳类化石(Pisidium amnicum Miiller)。在上三叠统中发现厚度超过800m的钙碱性岛弧型中酸性火山岩。岩浆侵入岩获得一批岩石化学资料和21个喜马拉雅期的同位素年龄数据(23～48Ma)，显示南部同碰撞、北部造山后拉张的特点。新近纪火山岩分布于测区北部，划分为2个喷发旋回，为板内裂谷活动的产物。发现中-晚侏罗世地层与晚三叠世地层的明显角度不整合接触面。查明了测区北部的二叠纪地层与上覆晚三叠世至侏罗纪地层为角度不整合接触。     

一次冰雹天气过程的雷达回波分析

从天气背景、雷达回波演变特征的角度分析2003年4月13日的冰雹天气过程，并利用单站资料和雷达回波进行冰雹天气短时预报做出总结。     

RELATIONSHIP BETWEEN P-T CONTITIONS OF TWO PHASES OF TAN-LU STRIKE-SLIP SHEAR ZONES AND DELAMINATION OF OROGENIC BELTS ON THE EASTERN MARGIN OF THE DABIE MOUNTAINS

The Tan-Lu fault zone joins the Dabie Mountains on its eastern margin, and offsets the Dabie and Sulu orogenic belts sinistrally for about 500 kin. On the basis of calculation of temperature and pressure experienced by the two phases of the fault zone as well as the thermo-chronological information on mylonite from the earlier and later Tan-Lu fault zones on the eastern margin of the Dabie Mountains, this paper discusses the delamination history and uplifting magnitudes of the Dabie Mountains from earlier Jurassic to earlier Cretaceous. From mineral assemblages, mineral deformation and muscovite-chlorite geothermometry calculation, it is known that the temperature experienced by the two phases of Tan-Lu fault zones are between 40℃ and 450℃, and the confining pressures are between 0.25Gpa and 0.36GPa for the earlier shear zones and 0.24-0.39GPa for the late shear zones. According to the geobarometry of Si-in-phengite and by considering shear heating and tectonic over-pressure, it is concluded that the maximum formation depths for the two phases of the ductile shear zones are not more than 12 kin. Differential formation depths for the two phases of shear zones are 1-2 km at most. At about 190 Ma and 128 Ma, the Tan-Lu fault zone experienced two phases of cooling events. During this period, the eastem margin of the Dabie Mountains experienced a tectonic calm period and no uplifting. According to information from the Tan-Lu fault zone, the uplifting magnitudes of the Dabie orogenic belts are not more than 12 km during the earlier Cretaceous.     

哈密坡子泉地区石炭系研究的新认识

通过野外工作 ,在前人所划的坡子泉地区石炭系白山组内新发现三个角度不整合 ,而将白山组解体成四个组。结合古生物化石和同位素年龄资料 ,将狼泉组和坡子泉组划归下石炭统 ,黑石山组和马庄山组划归上石炭统。在此基础上 ,研究了新划四个组的沉积环境 ,总结了坡子泉地区石炭纪地壳演化简史 ,建立了地层组合模式